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Mechanics: Efficiency of the Machine

A machine is supplied energy at a rate of 4,000 W and does useful work at a rate of 3,760 W. What is the efficiency of the machine?
a. 92 percent
b. 94 percent
c. 96 percent
d. 97 percent?

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Solution Summary

The efficiency of the machine can be found by dividing the useful work by the supplied energy.